Build Your Own Clone Message Board

It is currently Fri Aug 19, 2022 5:37 am

All times are UTC - 6 hours




Post new topic Reply to topic  [ 30 posts ]  Go to page 1, 2  Next
Author Message
 Post subject: PCB Component Map Needed
PostPosted: Thu Jul 08, 2021 1:50 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
Looking to mod my Analog Vibrato (Rev. 2.0) and I would like to know if there is a map for this board?
Thank you, in advance!

-=SteveO

p.s. I looked in here (viewtopic.php?f=20&t=39391) but didn't find one.

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Thu Jul 08, 2021 3:27 pm 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
SteveO--That's funny, I was asking about this yesterday (in your other vibrato mod thread) in prep for trying the flanger mod. If that's what you're after, and a map isn't already made, I'll let you know what I discover by studying the PCB with schematic in hand. It's a toss-up whether I start that pedal & mod next, or save it for after a tele build I will start soon, so I don't know exactly when I'll have it.


Top
 Profile  
 
PostPosted: Thu Jul 08, 2021 7:23 pm 
Offline
Moderator
User avatar

Joined: Tue Jan 02, 2007 1:24 pm
Posts: 15554
Location: Albany, NY
SteveO wrote:
Looking to mod my Analog Vibrato (Rev. 2.0) and I would like to know if there is a map for this board?

Nope. But feel free to make one! :mrgreen:

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2


Top
 Profile  
 
PostPosted: Thu Jul 08, 2021 8:15 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
WMP1 wrote:
SteveO--That's funny, I was asking about this yesterday (in your other vibrato mod thread) in prep for trying the flanger mod. If that's what you're after, and a map isn't already made, I'll let you know what I discover by studying the PCB with schematic in hand. It's a toss-up whether I start that pedal & mod next, or save it for after a tele build I will start soon, so I don't know exactly when I'll have it.


Yeah, I saw your post and thought that I'd start a fresh post to see if there would be any takers. According to Bob one doesn't exist but it would be ok for us to make one. :mrgreen:
I have the time to make one, just not the knowledge. Maybe I can work on those skills a little.
-=Steve

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Thu Jul 08, 2021 8:18 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
duhvoodooman wrote:
SteveO wrote:
Looking to mod my Analog Vibrato (Rev. 2.0) and I would like to know if there is a map for this board?

Nope. But feel free to make one! :mrgreen:


Thanks Bob! I have the time, unfortunately not the knowledge. Hummm, I guess since I have the time, I should work on acquiring some knowledge on schematics...

-=Steve

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Thu Jul 08, 2021 8:46 pm 
Offline
Moderator
User avatar

Joined: Tue Jan 02, 2007 1:24 pm
Posts: 15554
Location: Albany, NY
SteveO wrote:
Thanks Bob! I have the time, unfortunately not the knowledge. Hummm, I guess since I have the time, I should work on acquiring some knowledge on schematics...

I wasn't really serious. Almost all of those PCB maps were made by moderator Stephen, though he's been unable to do them the past couple of years. The process involves physically tracing (no pun intended) out both sides of the PCB against the schematic to identify all the component locations and then using a graphics program to label them on a PCB diagram or photo. It is tedious and painstaking work, and GOD BLESS STEPHEN for the countless hours he put in on the many PCB maps posted here on the forum!!

_________________
“My favorite programming language is SOLDER” - Bob Pease (RIP)

My Website * My Musical Gear * My DIY Pedals: Pg.1 - Pg.2


Top
 Profile  
 
PostPosted: Thu Jul 08, 2021 9:56 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
duhvoodooman wrote:
SteveO wrote:
Thanks Bob! I have the time, unfortunately not the knowledge. Hummm, I guess since I have the time, I should work on acquiring some knowledge on schematics...

I wasn't really serious. Almost all of those PCB maps were made by moderator Stephen, though he's been unable to do them the past couple of years. The process involves physically tracing (no pun intended) out both sides of the PCB against the schematic to identify all the component locations and then using a graphics program to label them on a PCB diagram or photo. It is tedious and painstaking work, and GOD BLESS STEPHEN for the countless hours he put in on the many PCB maps posted here on the forum!!


The graphics program is no problem for me. I can see that doing the tracing is going to be tedious. My granddaughter is visiting us for the weekend so I won't be able to submerge myself to deep in attempting that task for a few days. But I like a good challenge (I taught myself HTML code back in the day). I can see where having a blank PCB in my hand would help tremendously. Maybe I'll reach out to Keith and see if he has one laying around he'd be willing to sell. I don't like the idea of taking mine apart, but not totally against it. But I think an unpopulated board would be more of an asset.

-=Steve
p.s. Stephen, if you read this, just know your work is greatly appreciated!!

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Fri Jul 09, 2021 7:13 am 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
I have a blank one (Analog Vibrato Rev. 2.0) in hand because I haven't started stuffing it yet. Maybe I'll starting tracing a bit of it to get us started since there are a few junctions I want to find anyway.


Top
 Profile  
 
PostPosted: Fri Jul 09, 2021 10:04 am 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
WMP1 wrote:
I have a blank one (Analog Vibrato Rev. 2.0) in hand because I haven't started stuffing it yet. Maybe I'll starting tracing a bit of it to get us started since there are a few junctions I want to find anyway.

That'd be terrific Troy!
Thanks!

-=Steve

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Fri Jul 09, 2021 3:38 pm 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
Oh I think Troy is that other builder, the one with the Union Jack Shredder. You can call me "Schenectady."


Top
 Profile  
 
PostPosted: Fri Jul 09, 2021 3:57 pm 
Offline
Moderator
User avatar

Joined: Tue Feb 09, 2010 4:45 pm
Posts: 4531
Location: Rochester, NY
WMP1 wrote:
Oh I think Troy is that other builder, the one with the Union Jack Shredder. You can call me "Schenectady."

Troy, Schenectady, Skeneatles, Canajoharie, Albany… they're all just "over there" as far as I'm concerned. :mrgreen:

_________________
Scott

My band, Austin Hollow


Top
 Profile  
 
PostPosted: Fri Jul 09, 2021 4:11 pm 
Offline

Joined: Sat Jun 01, 2019 6:01 pm
Posts: 178
Location: Surprise, AZ
:lol:
Yep, I am Troy!

Hi SteveO! And Scott! And Schenectady! :mrgreen:

Lmao


Top
 Profile  
 
PostPosted: Sat Jul 10, 2021 9:21 am 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
WMP1 wrote:
Oh I think Troy is that other builder, the one with the Union Jack Shredder. You can call me "Schenectady."


Sorry about that! 'Schenectady' it is! And, I believe I am speaking for Troy as well, we'd all appreciate a little help with mapping of those areas covered in those mods!
Thank you, in advance!

-=Steve

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Sat Jul 10, 2021 9:34 am 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
Ok, so it's those mods you are after. I'll report on them as I get to them. But first I will also have to triple-check my work, as what I have so far indicates some deviance between the board I have (and its markings), and the schematic I am comparing it to. I have gotten as far as Q1, IC1b, Q2, and part of the 3207. Time to rest my eyes and do something a little more mindless for a while ... now where did I leave my partscaster ...


Top
 Profile  
 
PostPosted: Sat Jul 10, 2021 10:46 am 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
WMP1 wrote:
Ok, so it's those mods you are after. I'll report on them as I get to them. But first I will also have to triple-check my work, as what I have so far indicates some deviance between the board I have (and its markings), and the schematic I am comparing it to. I have gotten as far as Q1, IC1b, Q2, and part of the 3207. Time to rest my eyes and do something a little more mindless for a while ... now where did I leave my partscaster ...

No worries! I have plenty of other projects on the bench. I was trying to make some headway on it and my eyes gave out about 30 minutes in. So I can relate to that. Very tedious work, indeed!

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Sat Jul 10, 2021 1:51 pm 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
So far, I've attempted to trace the part of the PCB that corresponds to the upper half of the schematic, and therefore the part that has to do with the chorus mod and the proposed flanger mod. I'll describe in words what I found, and then go read the primer that I know is here somewhere about how to post images and come back to try that.

(1) There is a 200pF cap in the parts list and it has a spot on the PCB (right next to the six-pack of 10k resistors near the 6110, and which seem to be R14 through R19 inclusive and in order, right-to-left when looking at the component side of the PCB with the writing right-side up). But it isn't on the schematic, so it doesn't have a label of the sort "Rn". It ties the base of Q4 to ground, in a fashion analogous to the way C11 (220pF) ties the base of Q3 to ground, and presumably for the same purpose. (To suppress high-frequency noise?)

(2) C7 on the schematic is 10uF electrolytic, but on the PCB it is labeled as 1uF (it is right next to the 25k bias trim pot). This makes two electrolytics of 1uF on the PCB, which matches the number in the parts list, and I'm guessing it will match what I will find in the parts bag, given that I have found no commentary on this point in the threads I have read. It connects to pin 4 of the 3207 and I can't even guess what is an appropriate value for a cap that goes there.

(3) One of the access points for the suggested flanger mod is the junction of C12 and R19. Those two components are right next to each other on the PCB and a continuity checker is probably all you need to find out which two of the four pads connect (the "lower" two); they also connect to the emitter of Q4.

(4) Here's a slightly trickier part. The proposed flanger mod also shows, on the schematic, an access point at the junction of C2 and C3, also connecting to one end of R5. These components, along with R4, are the four that occupy the space just above and to the right of the 4558, on the way over toward the 6110. C2 is the one just above the 4558. However:

--(a) C2 and C3 don't actually connect to each other. They don't have a junction. This is because the actual topology implemented on the PCB I have has C3 and R4 swapped, w/r to what the schematic shows. From the point of view of how the vibrato circuit works, I don't think it makes a difference. The series connection of C3 and R4 should have the same kind of contribution to the frequency dependence of the gain of 4558 IC1b no matter which order they are in. If what I just wrote is not correct, I would love to be corrected about it! However, it raises the question of where the connection should be made for the flanger mod. I suspect it should be at the mutual C2/R4/R5 connection, but I'm not sure.

--(b) R3 and R4 reside on diametrically opposite sides of C2 on the PCB. The values of R3 and R4 given in the schematic are, respectively, 10k and 7.5k. The values printed on the PCB are swapped from this. I don't know which way was actually intended. The two values are similar enough that perhaps it doesn't really matter.

(5) The schematic shows C5 connecting on one end to the R8/R9 junction, and on its other end to the junction of R10 and pin 3 of the 3207 and the emitter of Q2. But the other end of C5 actually attaches to +V. Pin 3 of the 3207 connects the Q2 emitter, and to ground through R10, but nothing else joins that path as far as I can tell.


Top
 Profile  
 
PostPosted: Sat Jul 10, 2021 2:07 pm 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
Attachment:
File comment: so much for that primer ... I'll just have to wing it ... Partial map of the Analog Vibrato PCB w/r to 8/16/2018 schematic ... not guaranteed to be free of errors!
PCBtophalf03smaller.jpg
PCBtophalf03smaller.jpg [ 713.48 KiB | Viewed 5033 times ]


powered by pencil, post-it paper, patience, and a pitcher of Peri-peri sauce


Top
 Profile  
 
PostPosted: Sat Jul 10, 2021 5:36 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
WMP1 wrote:
powered by pencil, post-it paper, patience, and a pitcher of Peri-peri sauce


Damn! I guess you didn't find your partscaster??? Thanks a lot! I have company this weekend (my 5 year old granddaughter) so I won't get to attempt any mods on my pedal. But look out Monday!

Thanks again!!

-=Steve

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Sun Jul 11, 2021 11:57 am 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
Hey SteveO, for your tape warble jollies you can also read this older thread, which perhaps makes needing a full map unnecessary; in fact given how one image is marked up explicitly it may be better than a map.

http://www.byocelectronics.com/board/viewtopic.php?p=484869#p484869

Nonetheless here is what I have for the full map. As in my previous post, I can't guarantee it is free of errors.

The only differences between what I found on the PCB and what I read in the schematic has to do with voltage ref/supply "+Va". This is provided by a transistor that isn't numbered on the schematic, so I have referred to it as "QVa". In the schematic, it's far on the left in the lower half. On the PCB, it's way over on the right. The two chips TL022 (dual op amp, left-hand part of the lower half of the schematic) and BA6110 are shown in the schematic as being powered from +Va, but in fact they are powered from +V. I'm not sure what +Va is for--maybe provides a positive voltage supply that comes on line a few hundredths of a second after +V at power up, to make sure some things happen in a safe order.

Attachment:
File comment: Not guaranteed free from errors!
PCBall04smaller.jpg
PCBall04smaller.jpg [ 602.97 KiB | Viewed 5015 times ]


Top
 Profile  
 
PostPosted: Sun Jul 11, 2021 3:34 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
WMP1 wrote:
Hey SteveO, for your tape warble jollies you can also read this older thread, which perhaps makes needing a full map unnecessary; in fact given how one image is marked up explicitly it may be better than a map.

http://www.byocelectronics.com/board/viewtopic.php?p=484869#p484869

Nonetheless here is what I have for the full map. As in my previous post, I can't guarantee it is free of errors......


Thanks Troy! I think that the link you referenced has taken all the guess work out of it for me! I may have all the caps and switch 'in stock'. I have my first Vero board project arriving tomorrow (the SHO-OCD board that duhvoodooman shared a while back) so it will probably be awhile before I get to that mod. But it will happen! I also ordered a Shred Master PCB and related components from Tayda a few days ago, so I've got a few things to keep me busy. :mrgreen:
Just finishing up a Crown Jewel daughter board pedal today. Will post pictures in the 'show off your build' room in a bit. Thanks again for doing that map! Just curious... approximately how many hours did it take you to do that?

-=Steve

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Sun Jul 11, 2021 4:03 pm 
Offline
Moderator
User avatar

Joined: Tue Feb 09, 2010 4:45 pm
Posts: 4531
Location: Rochester, NY
Troy, I'm gonna need you to do that over using only one shade of yellow Post-it notes please. :mrgreen:

_________________
Scott

My band, Austin Hollow


Top
 Profile  
 
PostPosted: Sun Jul 11, 2021 4:08 pm 
Offline

Joined: Tue Jan 19, 2021 7:08 pm
Posts: 327
Location: Clovis, CA
sjaustin wrote:
Troy, I'm gonna need you to do that over using only one shade of yellow Post-it notes please. :mrgreen:

:mrgreen:

_________________
One of the great advantages of childhood is that nightmares usually come only when you are sleeping.


Top
 Profile  
 
PostPosted: Sun Jul 11, 2021 4:50 pm 
Offline

Joined: Sat Jun 01, 2019 6:01 pm
Posts: 178
Location: Surprise, AZ
It aint me. It aint meee-eee. I aint no PCB mappin' son, na, naw!

:mrgreen:


Top
 Profile  
 
PostPosted: Sun Jul 11, 2021 5:07 pm 
Offline
Moderator
User avatar

Joined: Tue Feb 09, 2010 4:45 pm
Posts: 4531
Location: Rochester, NY
Twilt wrote:
It aint me. It aint meee-eee. I aint no PCB mappin' son, na, naw!

:mrgreen:

SCHENECTADY

_________________
Scott

My band, Austin Hollow


Top
 Profile  
 
PostPosted: Sun Jul 11, 2021 7:34 pm 
Offline

Joined: Mon Nov 23, 2020 1:39 pm
Posts: 66
Location: Vermont
SteveO wrote:

approximately how many hours did it take you to do that?

-=Steve


I didn't keep track but it I am sure it was at least a couple of hours for each of the two halves. It was a fun puzzle. I wish I had learned more about how the circuit works while doing it, but, oh well. I reckon I will learn something when I actually build it.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 30 posts ]  Go to page 1, 2  Next

All times are UTC - 6 hours


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group